کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5476791 1521424 2017 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermohydraulic performance of solar air heater with staggered multiple V-shaped ribs on the absorber plate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Thermohydraulic performance of solar air heater with staggered multiple V-shaped ribs on the absorber plate
چکیده انگلیسی
Fluid flow and heat transfer in a solar air heater roughened with staggered multiple V-shaped ribs on the absorber plate were investigated numerically. Three dimensional simulations were performed for different rib geometries with varying stagger distance; rib height, pitch, and attack angle; and Reynolds number. Staggered multiple V-shaped ribs provide better heat transfer than the corresponding inline arrangement, with maximum enhancement 26% and 18% for average Nusselt number and thermohydraulic performance factor, respectively. Streamwise primary vortex with inter-rib subsidiary vortex is still the basic flow structure for the staggered ribs, similar to the inline case. The gap flow induces two competing effects on heat transfer, enhancing heat transfer efficiency maximally at the optimum stagger distance. Maximum thermohydraulic performance factor for the staggered ribs was 2.43 in the range of parameters studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 127, 15 May 2017, Pages 68-77
نویسندگان
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